Miss at cruise

[gs14racer]

Hey whats up guys

Havent driven the car in about a week, Took it out tonight to give it some use before this drift event im doing on sunday.

Anyways under power the car still flys and runs perfect however it has developed a miss while cruising in low gears at constant speed.

Say 45 mph in 4th or 5th it will give a slight miss or hicup every 5-7 seconds until you, its only at constant speed, if you give it a slight amount of gas it goes away completly.

What do you think it could be?

[elwesso]

Sounds sorta like when a Q MAF starts going bad, sorta weird if its fairly regular since MAF issues are usually fairly random.

You could try checking and cleaning the MAF and its connector.. Might be worth a try.

[gs14racer]

I got a few extra mafs ill try swapping one out see if that makes it go away

[maxnix]

Dirty intake path. TB, plenum. lower runners, IAC and EGR vavles.

Never been cleaned, I bet. BG44K? Fuel filter?

[gs14racer]

Throttle body, plenum, lower runners, and iac are spotless. I dont have an egr valve. Fuel filter is new

What is bg44k.

Spark plugs have less than 40 miles on them

[Q45tech]

I dont have an egr valve.

Who reprogrammed the ecu light load tables to change the parameters for NO EGR? Probably too much ignition advance for air without EGR dilution.

[gs14racer]

The ecu is stock, id agree with you on the advance thing, however ive been driving the car for about a month and its the first time this has happened.